???Chainring Question???

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2007-07-20 9:27 AM

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Subject: ???Chainring Question???
I've inherited an old Nishiki with  the Biopace chain rings in 52/42 -- My question?  Can I change these rings out with some fairly inexpensive "round" chain rings?  Or, can I change the 42 to something smaller that's round and still keep the 52 Biopace as the larger gear?... 

 

2007-07-20 9:31 AM
in reply to: #894126

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Master
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Subject: RE: ???Chainring Question???

DO you need a new chainring, or just don't like the biopace?    Either way, as long as you match up the hole spacings on your crank, you are good.   I think  you would be fine replacing one at a time, too.   You might look at a new crankset also.   I see closeout double cranks for under $50 all the time. 

 

 

2007-07-20 9:44 AM
in reply to: #894133

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Subject: RE: ???Chainring Question???
tkbslc - 2007-07-20 10:31 AM

DO you need a new chainring, or just don't like the biopace?    Either way, as long as you match up the hole spacings on your crank, you are good.   I think  you would be fine replacing one at a time, too.   You might look at a new crankset also.   I see closeout double cranks for under $50 all the time. 

Thanks for the quick reply -- Yeah, this 42 is killing me on hills, and I'd like to put maybe a 39 in it's place if that would give much help on the hills (The cassette is something like 11/23 I think, so I don't have much low-end).  Where might I look to see some of the double cranks you're speaking of??

 

2007-07-20 11:10 AM
in reply to: #894126

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Champion
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Subject: RE: ???Chainring Question???
Check the Salsa chainrings at Excel Sports Boulder ( http://www.excelsports.com/new.asp?page=8&description=Chainring+Sma...

If it's a 130 bolt pattern (as opposed to 110), you can get down to a 38 on there. And it's only $20. No ramps and pins, so it won't shift quite as smooth as a Shimano ring, but I've used them with finicky STIs with no problems.
2007-07-20 11:14 AM
in reply to: #894343

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Subject: RE: ???Chainring Question???

briderdt - 2007-07-20 12:10 PM Check the Salsa chainrings at Excel Sports Boulder ( http://www.excelsports.com/new.asp?page=8&description=Chainring... If it's a 130 bolt pattern (as opposed to 110), you can get down to a 38 on there. And it's only $20. No ramps and pins, so it won't shift quite as smooth as a Shimano ring, but I've used them with finicky STIs with no problems.

Thanks for the reply...  Another novice question:  How can I tell if it's a 130 or 110 bolt pattern?

2007-07-20 11:18 AM
in reply to: #894347

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Champion
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Subject: RE: ???Chainring Question???
Measure from the center of the crankarm to one bolt, and then double it. In millimeters.

2007-07-20 12:01 PM
in reply to: #894352

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Subject: RE: ???Chainring Question???

briderdt - 2007-07-20 12:18 PM Measure from the center of the crankarm to one bolt, and then double it. In millimeters.

Thanks - It looks to be 130 mm...

2007-07-20 12:19 PM
in reply to: #894126

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Master
3019
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West Jordan, UT
Subject: RE: ???Chainring Question???

As far as cheaper cranksets, just look at all the major online shops.   Nashbar's got some for under $50 - you may need a new Bottom bracket too, though.     Ebay would be a good place to look as well.  Just make sure you get the same BB type, (probably square taper)

Another (probably cheaper) option might be to swap out the cassette with a wider range.   If you are 11/23 now, going 12/27 would be as good or better than going from 42 to 39 in front.  

 

 

2007-07-21 5:37 AM
in reply to: #894126

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Subject: RE: ???Chainring Question???
Thanks for all the help guys - I'm going to go with the Salsa 38 (20 bucks) and see how that works - I may end up changing the cassette if I need more versatility from the gearing -

Edited by Pop 2007-07-21 5:38 AM
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